Rope clamping device for controlling falling acceleration of lift car and testing device
By designing a rope clamping device, the elevator car's falling speed is controlled using clamping plates and compression spring assemblies. This solves the problem that existing technologies cannot simulate different acceleration conditions, thus achieving accuracy and safety in speed governor performance testing.
Patent Information
- Application Number
- CN202423115608.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-17
AI Technical Summary
Existing technologies lack effective devices and methods to control the falling speed of elevator cars under different acceleration conditions, which fails to meet the requirements for speed governor performance testing.
A rope clamping device was designed, including components such as a housing, a sliding plate, a clamping plate, and a compression spring. It generates braking force by clamping the rope, and combines a pressure sensor to monitor and adjust the clamping force in real time, thereby controlling the acceleration of the car's fall.
It enables precise adjustment and monitoring of the car's fall acceleration, meets the requirements of speed governor performance testing, and ensures elevator safety and testing accuracy.
Smart Images
Figure CN223522109U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to elevator test technical field, concretely relates to a kind of rope clamping device and testing device for controlling car falling acceleration. BACKGROUND
[0002] When elevator occurs dangerous fall, the falling acceleration of car can change in the range of 0-1g n . According to TSGT7007-2022 "Elevator Type Test Rules", the speed limiter only needs to carry out action speed test under the condition of as small acceleration as possible and free fall test with acceleration of at least 0.9g n -1.0g n , but ignores the test of car under other acceleration conditions. Therefore, it is necessary to add a deceleration device on the speed limiter free fall test bench to ensure that the deceleration of the speed limiter can be controlled within the required range. Therefore, how to develop a rope clamping device for controlling car falling acceleration, which needs to have the ability to adjust the falling acceleration of the car, to simulate multiple working conditions of falling downward at different accelerations from a stationary state, so as to test the performance of the speed limiter, is an urgent problem to be solved at present. SUMMARY
[0003] In view of the problems existing in the prior art, the first object of the utility model is to provide a rope clamping device for controlling car falling acceleration. When testing, the car falls downward, and through the action of the rope clamping device, the rope produces a braking force, and the car runs downward at the required acceleration of the speed limiter test, to meet the test requirements.
[0004] The second object of the utility model is to provide a testing device that can test the performance of the speed limiter under the working condition of the car falling downward at different accelerations from a stationary state.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:
[0006] A rope clamping device for controlling the acceleration of a falling elevator car, comprising: a top-opened housing, a through slot is arranged at the bottom of the housing for receiving a rope clamping rope, a first sliding plate, a second sliding plate and a third sliding plate are slidably arranged inside the housing along the length direction thereof to divide the space inside the housing into a power chamber, a pressurizing chamber, a clamping chamber and a pressure sensing chamber; the power chamber comprises a screw rod, one end of the screw rod is rotatably connected to one side of the first sliding plate, the other end of the screw rod extends to the outside of the side wall of the housing; the pressurizing chamber comprises a compression spring, one end of the compression spring is fixed to one side of the second sliding plate, the other end of the compression spring is fixed to the other side of the first sliding plate, and the compression spring and the screw rod are both on the central axis of the housing; the clamping chamber comprises a first clamping plate and a second clamping plate, the first clamping plate is detachably arranged on the other side of the second sliding plate, and the second clamping plate is detachably arranged on one side of the third sliding plate, one side of the first clamping plate has a plurality of arc-shaped grooves, one side of the second clamping plate has a flat surface, and a clamping space for receiving the rope clamping rope is formed between the arc-shaped grooves and the flat surface; the pressure sensing chamber comprises a pressure sensor fixed to the inner side wall of the housing, and the sensing end of the pressure sensor abuts against the other side of the third sliding plate for monitoring the pressure change in the clamping space.
[0007] Further, at least one guide rod is arranged inside the housing, the guide rod extends and is fixed along the length direction of the housing to connect the first sliding plate, the second sliding plate and the third sliding plate in series.
[0008] Further, the number of the guide rods is two, and the two guide rods are respectively located near two opposite inner side walls of the housing.
[0009] Further, the other end of the screw rod is provided with a driver for driving the rotation of the screw rod.
[0010] Further, the driver is a hand crank or an electric motor.
[0011] Further, the side wall of the housing is provided with a threaded hole matched with the screw rod.
[0012] Further, the other side of the first sliding plate is provided with a first inner recessed portion, one side of the second sliding plate is provided with a second inner recessed portion, and the two ends of the compression spring are respectively fixed in the first inner recessed portion and the second inner recessed portion.
[0013] Further, the other side of the first clamping plate has a first protrusion, the other side of the second sliding plate has a first groove matched with the first protrusion, the first protrusion is slidably connected in the first groove, the other side of the second clamping plate has a second protrusion, one side of the third sliding plate has a second groove matched with the second protrusion, and the second protrusion is slidably connected in the second groove.
[0014] A test device comprises: a test frame arranged vertically, a traction machine provided at the top of the test frame, a main rope wound around the traction machine, a landing gear provided inside the test frame and connected to one end of the main rope, a car provided below the landing gear and connected through an unhooker, a counterweight frame provided inside the test frame and connected to the other end of the main rope, the counterweight frame moving inside the test frame along with the movement of the landing gear, a speed limiter provided at the top of the test frame and wound around a speed limiting rope, one end of the speed limiting rope connected to the top of the car, the other end of the speed limiting rope wound around a first guide wheel provided at the bottom of the test frame and connected to the bottom of the car, and the above-mentioned rope clamping device provided at the top of the test frame, one end of the rope clamping rope connected to the top of the car, the other end of the rope clamping rope penetrating the rope clamping device and wound around a second guide wheel provided at the bottom of the test frame and then connected to the bottom of the car.
[0015] Further, the top of the car is provided with an acceleration sensor and a pull force sensor, the pull force sensor is connected to one end of the speed limiting rope, the outer side of the speed limiter is provided with a speed sensor, a magnetic induction switch and an electrical switch.
[0016] The utility model has the advantages of:
[0017] The rope clamping device for controlling the falling acceleration of the car of the utility model is provided with a power chamber, a pressurizing chamber, a clamping chamber and a pressure sensing chamber, so that the falling acceleration of the car can be controlled. When the performance of the elevator speed limiter needs to be tested and the free falling scene of the car needs to be simulated, the first clamping plate and the second clamping plate in the clamping chamber can clamp the rope clamping rope with different clamping forces, so that the falling speed of the car can be controlled. The compression spring and the screw rod are used in cooperation, so that the compression spring can be compressed and the first sliding plate and the second sliding plate can be moved, and then the first clamping plate and the second clamping plate can clamp the rope. Meanwhile, the screw rod can also adjust the tightness of the rope clamping rope, so as to adapt to different test requirements. The pressure sensor can monitor the pressure change in the clamping space in real time, so as to indirectly reflect the stress condition of the rope clamping rope, and provide important data support for controlling the falling acceleration of the car. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is the three-dimensional structure schematic view of the rope clamping device for controlling the falling acceleration of the car.
[0019] Figure 2 is the top view of the rope clamping device for controlling the falling acceleration of the car.
[0020] Figure 3 is the three-dimensional structure schematic view of the shell.
[0021] Figure 4 is the three-dimensional structure schematic view of the first clamping plate and the second clamping plate.
[0022] Figure 5 is the three-dimensional structure schematic view of the second sliding plate.
[0023] Figure 6 is the three-dimensional structure schematic view of the third sliding plate.
[0024] Figure 7 is the front view of the test device with the rope clamping device.
[0025] Figure 8 is the side view of the test device with the rope clamping device.
[0026] Wherein, 1 is the rope clamping device, 101 is the shell, 101a is the through groove, 101b is the extension column, 101c is the threaded hole, 102 is the first sliding plate, 103 is the second sliding plate, 103a is the second inner recess part, 104 is the third sliding plate, 104a is the second groove, 105 is the compression spring, 106 is the guide rod, 107 is the first clamping plate, 107a is the first protrusion, 107b is the arc-shaped groove, 108 is the second clamping plate, 108a is the second protrusion, 108b is the plane, 109 is the pressure sensor, 110 is the driver, 111 is the screw rod, 112 is the clamping space, 2 is the rope clamping rope, 201 is the second guide wheel, 202 is the third guide wheel, 3 is the test frame, 301 is the traction machine, 301a is the main rope, 302 is the landing gear, 303 is the unhooker, 304 is the car, 305 is the counterweight frame, 306 is the speed limiter, 306a is the speed limiting rope, 306b is the first guide wheel. DETAILED DESCRIPTION
[0027] The following description is merely exemplary in nature and is in no way intended to limit the present application, its application, or uses. It should be understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. It will be understood that when an element, component, and / or part is referred to as being "connected to" another element, component, and / or part, it can be directly connected to the other element, component, and / or part or intervening elements can be present. It will be understood that, although the terms "first," "second," etc. can be used herein to describe various elements, components, and / or parts, these elements, components, and / or parts should not be limited by these terms since such terms are only used to distinguish one element, component, and / or part from another element, component, and / or part. Thus, a first element, component, and / or part discussed below could be termed a second element, component, and / or part without departing from the teachings of the present application. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and / or the
[0028] It is to be understood that the drawings are not necessarily to scale, and that the various embodiments disclosed herein are illustrative only and not restrictive in character, of the application, its application, or uses. Additionally, it should be understood that any embodiment described herein and its incorporated technical features can be combined with each other.
[0029] The present application will be further described with reference to the drawings and specific embodiments.
[0030] As Figures 1-3As shown, a rope clamping device 1 for controlling the falling acceleration of a car mainly comprises a shell 101, a first sliding plate 102, a second sliding plate 103 and a third sliding plate 104, wherein the top of the shell 101 is open to form an opening, and the bottom of the shell 101 is provided with a through slot 101a for receiving a clamping rope 2. Specifically, the shell 101 comprises four side plates and a bottom plate, the bottom plate is rectangular, the four side plates are vertically arranged on the four outer sides of the bottom plate respectively, and the bottom plate and the four side plates together form a rectangular shell with an open top. The through slot 101a is arranged on the bottom plate along the width direction of the bottom plate, so that the clamping rope 2 can vertically pass through the inside of the shell 101 from the top opening and pass out from the through slot 101a. The first sliding plate 102, the second sliding plate 103 and the third sliding plate 104 are slidably arranged inside the shell 101 along the length direction of the shell 101. The first sliding plate 102, the second sliding plate 103 and the third sliding plate 104 are all square structures, which are vertically arranged inside the shell 101 and parallel to each other. The first sliding plate 102, the second sliding plate 103 and the third sliding plate 104 divide the space inside the shell 101 into a power chamber, a pressurizing chamber, a clamping chamber and a pressure sensing chamber, which are arranged in sequence along the length direction of the shell 101, and the clamping rope 2 penetrates through the clamping chamber. At least one guide rod 106 is arranged inside the shell 101, which extends and is fixed along the length direction of the shell 101 to connect the first sliding plate 102, the second sliding plate 103 and the third sliding plate 104 together, so as to ensure the stability and consistency of them during movement. The guide rod 106 is parallel to the compression spring 105 and the screw rod 111 respectively, and the first sliding plate 102, the second sliding plate 103 and the third sliding plate 104 are all provided with guide holes corresponding to the guide rod 106. The number of guide rods 106 is two, and the two guide rods 106 are respectively located near the two opposite inner side walls of the shell 101.
[0031] With reference to the foregoing Figure 1 and Figure 2The power chamber comprises a screw rod 111, one end of the screw rod 111 is rotatably connected to one side of the first sliding plate 102, the other end of the screw rod 111 extends to the outside of the side wall of the shell 101, the first sliding plate 102 can move inside the shell 101 along the length direction of the shell 101 by rotating the screw rod 111, wherein the screw rod 111 is substantially parallel to the length direction of the shell 101. The side wall of the shell 101 is provided with a threaded hole 101c matched with the screw rod 111, the screw rod 111 extends to the outside of the shell 101 through the threaded hole 101c, an extension column 101b is arranged outside the shell 101, the extension column 101b has a threaded hole matched with the threaded hole 101c inside, so as to increase the matching effect between the screw rod 111 and the threaded hole and improve the self-locking fastening degree of the screw rod 111. When the screw rod 111 rotates to move the first sliding plate 102 to a predetermined position, the position of the first sliding plate 102 inside the shell 101 is fixed by the threaded matching between the screw rod 111 and the threaded hole, so as to prevent the first sliding plate 102 from moving or loosening accidentally during the test.
[0032] Next, with reference to Figure 1 , 2 and 5, the pressurizing chamber comprises a compression spring 105, the compression spring 105 extends and is fixed along the length direction of the shell 101, one end of the compression spring 105 is fixed to one side of the second sliding plate 103, the other end of the compression spring 105 is fixed to the other side of the first sliding plate 102, the compression spring 105 and the screw rod 111 are both on the central axis of the shell 101, when the screw rod 111 pushes the first sliding plate 102 to move, the compression spring 105 can act and push the second sliding plate 103 to move synchronously. Wherein, the other side of the first sliding plate 102 is provided with a first inner recess portion (not shown in the figure), one side of the second sliding plate 103 is provided with a second inner recess portion 103a, the two ends of the compression spring 105 are fixed in the first inner recess portion and the second inner recess portion 103a respectively, so as to ensure the stability of the connection between the compression spring 105 and the two sliding plates.
[0033] Next, with reference to Figure 1 , 2, 4 and 6, the clamping chamber comprises a first clamping plate 107 and a second clamping plate 108, the first clamping plate 107 is detachably arranged on the other side of the second sliding plate 103, and the second clamping plate 108 is detachably arranged on one side of the third sliding plate 104, one side of the first clamping plate 107 has a plurality of arc-shaped grooves 107b matched with the clamping rope 2, and one side of the second clamping plate 108 has a flat surface 108b, and the arc-shaped grooves 107b and the flat surface 108b form a clamping space 112 for receiving the clamping rope 2. The other side of the first clamping plate 107 has a first protrusion 107a, the other side of the second sliding plate 103 has a first recess matched with the first protrusion 107a, the first protrusion 107a is slidably connected in the first recess, and the other side of the second clamping plate 108 has a second protrusion 108a, one side of the third sliding plate 104 has a second recess 104a matched with the second protrusion 108a, and the second protrusion 108a is slidably connected in the second recess 104a, wherein the cross section of the first protrusion 107a and the second protrusion 108a is T-shaped structure, and the cross section of the corresponding first recess and the second recess 104a is also T-shaped. In this way, the first clamping plate 107 and the second clamping plate 108 can be conveniently replaced, so as to replace the clamping plate with different size of arc-shaped grooves 107b, so as to adapt to different size of clamping rope 2, and the clamping plate worn due to long time clamping of the clamping rope 2 during the test can be conveniently replaced. In the embodiment, the number of clamping ropes 2 is two, and the corresponding arc-shaped grooves 107b are also two. Of course, the number of arc-shaped grooves 107b can be adjusted according to the number of clamping ropes 2, such as one, three, four, etc. The compression spring 105 pushes the second sliding plate 103 to move, so as to adjust the distance between the second sliding plate 103 and the third sliding plate 104, that is, to adjust the space of the first clamping plate 107 and the second clamping plate 108 for clamping the clamping rope 2.
[0034] Referring again to Figure 1 and Figure 2 , the pressure sensing chamber comprises a pressure sensor 109 fixed on the inner side wall of the shell 101, and the sensing end of the pressure sensor 109 abuts against the other side of the third sliding plate 104, for monitoring the pressure change in the clamping space 112. The pressure sensor 109 can provide direct feedback about the clamping state of the clamping rope 2, so as to help the operator to adjust the clamping force in time, and ensure the accuracy and safety of the test.
[0035] As Figure 1 and Figure 2As shown, the other end of the screw rod 111 is provided with a driver 110 for driving the screw rod 111 to rotate, so as to realize quick adjustment of the tightness of the rope 2. The driver 110 is a hand crank or a motor. In the embodiment, the driver 110 is a hand crank. By manually operating the hand crank, the spacing between the first slide plate 102, the second slide plate 103 and the third slide plate 104 changes with the rotation of the screw rod 111, so as to realize adjustment of the clamping force of the rope 2.
[0036] As Figure 7 and Figure 8As shown, a test device includes a test frame 3, a traction machine 301, a landing gear 302, a car 304, a counterweight frame 305, a speed limiter 306, and the above-mentioned rope clamping device 1. The test frame 3 is vertically arranged, and the top of the test frame 3 is provided with the traction machine 301 for providing power, and the traction machine 301 is hung around with a main rope 301a. The landing gear 302 is arranged inside the test frame 3 and connected to one end of the main rope 301a, and the car 304 is arranged below the landing gear 302 and connected through an unhooker 303 for the separation of the landing gear 302 and the car 304, and the unhooker 303 wirelessly remotely controls the hooking and unhooking to make the car 304 free fall, and the unhooker 303 can be a turnover claw type automatic unhooker, a remote control hook automatic unhooker, or a wireless electric automatic unhooker, etc. The counterweight frame 305 is arranged inside the test frame 3 and connected to the other end of the main rope 301a, and the counterweight frame 305 moves inside the test frame 3 with the movement of the landing gear 302, and the counterweight frame 305 is internally configured with a plurality of counterweight blocks, and the number of counterweight blocks is adjusted according to the weight of the car 304, to ensure that the car 304 does not have insufficient traction during the installation of the counterweight. The speed limiter 306 is arranged at the top of the test frame 3 and hung around with a speed limiting rope 306a, one end of the speed limiting rope 306a is connected to the top of the car 304, and the other end of the speed limiting rope 306a is hung around a first guide wheel 306b arranged at the bottom of the test frame 3 and connected to the bottom of the car 304. The rope clamping device 1 is arranged at the top of the test frame 3, one end of the clamping rope 2 is connected to the top of the car 304, the other end of the clamping rope 2 penetrates the rope clamping device 1 and is hung around a second guide wheel 201 arranged at the bottom of the test frame 3, and is then connected to the bottom of the car 304, wherein the top of the test frame 3 also has a third guide wheel 202 located above the rope clamping device 1, and one end of the clamping rope 2 is first hung around the third guide wheel 202 and then connected to the top of the car 304. When the test of the car 304 falling at different accelerations in a stationary state is carried out, the car 304 is driven to the test height by the traction machine 301 and is in a stationary state, and the clamping force of the rope clamping device 1 on the clamping rope 2 is adjusted according to the acceleration requirement. Specifically, the compression spring 105 is compressed and pushes the first clamping plate 107 and the second clamping plate 108 to clamp the clamping rope 2 by manually operating the hand crank, and the value of the pressure sensor 109 gradually increases, and when the force value of the pressure sensor 109 reaches the adjustment requirement, the operation of the hand crank is stopped, at this time the rope clamping device 1 generates a certain clamping force on the clamping rope 2, and the brake force on the clamping rope 2 is generated through the rope clamping device 1, so that the deceleration of the speed limiter 306 is controlled within the test requirement range. Then the unhooker 303 is controlled to unhook, so that the car 304 falls at a set acceleration, thereby triggering the action of the speed limiter 306, and finally falling at the bottom of the test frame 3.
[0037] In an embodiment not shown, the top of the car 304 is provided with an acceleration sensor for collecting the acceleration of the car 304 and a pulling force sensor connected to one end of the speed limiting rope 306a for collecting the pulling force of the speed limiting rope 306a. The pulling force sensor is an S-shaped force sensor with a maximum range of 10,000 N. The outside of the speed limiter 306 is provided with a speed sensor, a magnetic induction switch and an electrical switch. The speed sensor is a speed measuring generator. During the test, the speed measuring wheel is placed on the wheel of the speed limiter 306 to test the wheel speed of the speed limiter 306. The magnetic induction switch is located near the mechanical moving part of the speed limiter 306 for testing the mechanical moving speed of the speed limiter 306. The electrical switch is located on the side of the speed limiter 306 for detecting the electrical moving speed of the speed limiter 306.
[0038] Wherein, the rope clamping device 1 adjusts the acceleration of the car 304 according to the following manner. The weight of the car 304 is M, the test deceleration of the speed limiter 306 is g, and the braking force required to be generated on the clamping rope 2 can be calculated according to formula (1) . The friction force between the clamping rope 2 and the first clamping plate 107 and the second clamping plate 108 is , and the number of clamping ropes 2 is n. The pressure value of the pressure sensor 109 on the rope clamping device 1 can be calculated according to formula (2) . By rotating the screw rod 111 through the driver 110, the compression spring 105 is compressed or relaxed, and the clamping space 112 formed by the first clamping plate 107 and the second clamping plate 108 clamps the clamping rope 2. The pressure sensor 109 reads the force value data. When the force value of the pressure sensor 109 reaches the adjustment force value, the driver 110 is stopped, and the clamping position is locked by the cooperation of the screw rod 111 and the threaded hole. At this time, the rope clamping device 1 generates a certain clamping force on the clamping rope 2. During the test, the car 304 falls downward, and due to the action of the rope clamping device 1, the clamping rope 2 generates a braking force, and the car 304 runs downward at the test required acceleration of the speed limiter 306.
[0039] (1)
[0040] (2)
[0041] In this embodiment, the weight of the car 304 is 300 kg, the test deceleration of the speed limiter 306 is 5 m / s 2Therefore, the braking force 1440N required to be generated on the rope 2 can be calculated according to formula (1). The friction force between the rope 2 and the first clamping plate 107 and the second clamping plate 108 is 0.3, and the rope 2 is two 8mm steel wires, so the pressure value 2400N of the pressure sensor 109 on the rope clamping device 1 can be calculated according to formula (2). By manually operating the hand crank, the compression spring 105 is compressed or relaxed, the clamping space 112 formed by the first clamping plate 107 and the second clamping plate 108 clamps the rope 2, and the value of the pressure sensor 109 gradually increases. When the force value of the pressure sensor 109 reaches 2400N, stop operating the hand crank, at this time the rope clamping device 1 generates a certain clamping force on the rope 2. During the test, the car 304 falls downward, and due to the action of the rope clamping device 1, the rope 2 generates a braking force, and the car 304 runs downward at the required acceleration of the speed governor 306.
[0042] In summary, the rope clamping device for controlling the falling acceleration of the car of the utility model, through setting power chamber, pressurizing chamber, clamping chamber and pressure sensing chamber, realize the control to the falling acceleration of the car. When the performance of the elevator speed governor needs to be tested, the first clamping plate and the second clamping plate in the clamping chamber clamp the rope with different clamping forces, so as to control the falling speed of the car. Through the cooperation of the compression spring and the screw rod, the compression spring can be compressed and the first sliding plate and the second sliding plate can be pushed to move, and then the first clamping plate and the second clamping plate clamp the rope. At the same time, the tightness of the rope can be adjusted by the screw rod to adapt to different test requirements. The pressure sensor can monitor the pressure change in the clamping space in real time, so as to indirectly reflect the stress condition of the rope, and provide important data support for controlling the falling acceleration of the car.
[0043] The above embodiment is the preferred embodiment of the utility model, but the embodiment of the utility model is not limited by the above embodiment, any change, modification, replacement, combination and simplification made without departing from the spirit and principle of the utility model shall be equivalent replacement mode, and all are included in the protection scope of the utility model.
Claims
1. A rope gripping device for controlling the acceleration of a falling car, characterized in that, The utility model relates to a rope clamping device, including: The bottom of the shell is provided with a through slot for receiving a rope clamping rope, a first sliding plate, a second sliding plate and a third sliding plate are slidably arranged inside the shell along the length direction of the shell to divide the space inside the shell into a power chamber, a pressurizing chamber, a clamping chamber and a pressure sensing chamber; The power chamber comprises a screw rod, one end of the screw rod is rotatably connected to one side of the first sliding plate, the other end of the screw rod extends to the outside of the side wall of the shell; The pressurizing chamber comprises a compression spring, one end of the compression spring is fixed to one side of the second sliding plate, the other end of the compression spring is fixed to the other side of the first sliding plate, and the compression spring and the screw rod are both on the central axis of the shell; The clamping chamber comprises a first clamping plate and a second clamping plate, the first clamping plate is detachably arranged on the other side of the second sliding plate, and the second clamping plate is detachably arranged on one side of the third sliding plate, one side of the first clamping plate has a plurality of arc-shaped grooves, one side of the second clamping plate has a flat surface, and a clamping space for receiving the rope clamping rope is formed between the arc-shaped grooves and the flat surface; The pressure sensing chamber comprises a pressure sensor fixed to the inner side wall of the shell, and the sensing end of the pressure sensor abuts against the other side of the third sliding plate to monitor the pressure change in the clamping space.
2. A roping device for controlling the acceleration of a falling car according to claim 1, characterized in that At least one guide rod is arranged inside the shell, the guide rod extends and is fixed along the length direction of the shell to connect the first sliding plate, the second sliding plate and the third sliding plate in series.
3. A roping device for controlling the acceleration of a falling car according to claim 2, characterized in that The number of guide rods is two, and the two guide rods are respectively located near two opposite inner side walls of the shell.
4. A roping device for controlling the acceleration of a falling car according to claim 1, characterized in that, The other end of the screw rod is provided with a driver for driving the screw rod to rotate.
5. A roping device for controlling the acceleration of a falling car according to claim 4, characterized in that The driver is a hand crank or a motor.
6. A roping device for controlling the acceleration of a falling car according to claim 1, characterized in that, The side wall of the shell is provided with a threaded hole matched with the screw rod.
7. A roping device for controlling the acceleration of a falling car according to claim 1, characterized in that, The other side of the first sliding plate is provided with a first concave part, one side of the second sliding plate is provided with a second concave part, and the two ends of the compression spring are respectively fixed in the first concave part and the second concave part.
8. A roping device for controlling car fall acceleration according to claim 1, wherein The other side of the first clamping plate has a first protrusion, the other side of the second sliding plate has a first groove matched with the first protrusion, the first protrusion is slidably connected in the first groove, the other side of the second clamping plate has a second protrusion, one side of the third sliding plate has a second groove matched with the second protrusion, and the second protrusion is slidably connected in the second groove.
9. A test device, characterized by The utility model relates to a rope clamping device, including: A test frame is vertically arranged, a traction machine is arranged on the top of the test frame, and a main rope is hung on the traction machine; A landing gear is arranged inside the test frame and connected to one end of the main rope, and a car is arranged below the landing gear and connected through an unhooker; A counterweight frame is arranged inside the test frame and connected to the other end of the main rope, and the counterweight frame moves in the test frame along with the movement of the landing gear; A speed limiter is arranged on the top of the test frame and hung around a speed limiting rope, one end of the speed limiting rope is connected to the top of the car, the other end of the speed limiting rope is hung around a first guide wheel arranged on the bottom of the test frame and connected to the bottom of the car; The rope clamping device of any one of claims 1 to 8 is arranged on the top of the test frame, one end of the rope clamping rope is connected to the top of the car, the other end of the rope clamping rope penetrates through the rope clamping device, is hung around a second guide wheel arranged on the bottom of the test frame, and is connected to the bottom of the car.
10. The test device of claim 9, wherein, An acceleration sensor and a pulling force sensor are arranged on the top of the car, the pulling force sensor is connected to one end of the speed limiting rope; a speed sensor, a magnetic induction switch and an electrical switch are arranged on the outside of the speed limiter.